CHA type zeolitic materials and methods for their preparation

Abstract

The present disclosure relates to a process for the preparation of a zeolitic material having a CHA-type framework structure comprising YO2 and X2O3, wherein the process comprises:(1) providing a mixture comprising one or more sources for YO2, one or more sources for X2O3, one or more tetraalkylammonium cation R1R2R3R4N+-containing compounds, and one or more tetraalkylammonium cation R5R6R7R8N+-containing compounds as structure directing agent;(2) crystallizing the mixture to obtain a zeolitic material having a CHA-type framework structure;wherein Y is a tetravalent element and X is a trivalent element,wherein R1, R2, R3, R5, R6, and R7 independently from one another stand for alkyl, wherein R4 stands for CnH2nOH with n=1 to 6, andwherein R8 stands for cycloalkyl.

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